Reflection-Type Metasurface for Generating Two Orbital Angular Momentum Modes Based on Orthogonal Polarization

Abstract

A metasurface with novel dual linear polarization reflective element generates two OAM modes is analyzed and designed. The element consists of a cross patch and four phase delay lines on both sides of the substrate, connected by metal vias for cell minimization. The simulation results show that the phase and amplitude of two modes on the observation plane meet the requirements. The proposed method could further promote the application of OAM multiplexing.